About Cantwell & Stein Realtors

Cantwell and Stein Realtors isn’t just a brokerage — we’re a legacy-building partner.

With over 30 years of combined expertise spanning real estate, hospitality, project management, and coaching, we guide individuals and families to make moves that matter. This is not a transactional team — it’s a purpose-driven family brokerage built to educate, empower, and equip you to thrive for decades.

Whether you’re a first-time buyer, a seasoned investor, or planning for generational wealth, we bring you top-tier service, expert negotiation, state-of-the-art AI tools, and a deep network of trusted professionals. The results? A client experience that delivers beyond the sale.

Meet the Team

Mario Ponce 925-595-3192 Email Memario@family1stalliance.com

Testimonials

"Mario was fantastic to work with on finding a local Condo as a first time home buyer! He was very patient with me and always went the extra mile to make sure i found what i was looking for. He was very responsive throughout the process and was willing to work weekends or evenings to meet deadlines. He was willing to do a zoom and meet my parents in person as they were involved with the financing and very good at social interactions. Would definitely use him again in the future or recommend him to family and friends."

"Mario found our ideal home! We highly recommend Mario. He was extremely informative and knowledgeable about real estate during the entire process of purchasing our home. He listened carefully and took the time to understand our preferences and lifestyle. He was always available to answer our questions, no matter what hour it was. He provided support beyond the transaction itself. For example, when we were stressed out about loan and closing deadlines, he kept us optimistic. We felt that he genuinely cared about us. Mario is an excellent agent with a heart."

"Mario did an outstanding job assisting me with the purchase of my condo. He was not only very knowledgeable on the area, but was extremely knowledgeable on the condition of the properties, and would alert me to any major work that would need to be done (I.e. water damage). Mario was always responsive and worked with my crazy schedule to ensure I toured properties of interest."

"I want to say thank Mario for helping my mom purchase her new home! He was kind, professional, honest, and extremely knowledgeable about the entire real estate market and process. Couldn’t have picked a better agent, and person, to get this done.

Thank you Mario you for all that you do! You are the best!"

"If you are thinking about working with another agent right now, STOP, and meet Mario. Right out the gate, Mario proved to be personable and professional during one of the most stressful and exciting processes of our life. As first time homebuyers, admittedly we needed some hand-holding at times, and Mario was quick to reassure and comfort us. With his tenacity and persistence, he was on top of each and every single task to help alleviate all our concerns. We give Mario our highest recommendation."

"Mario is the man! In the beginning I was going to work with another realtor but I met him at a listing his colleague was showing. We hit it off and I never looked back. He helped me through the process and all the ups and downs that go with it. In the end I found a great house and found a great friend. Thanks Mario!"